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General Description

The MAX1617 is a precise digital thermometer that reports the temperature of both a remote sensor and its own package. The remote sensor is a diode-connected transistor—typically a low-cost, easily mounted 2N3904 NPN type—that replaces conventional thermistors or thermocouples. Remote accuracy is ±3°C for multiple transistor manufacturers, with no calibration needed. The remote channel can also measure the die temperature of other ICs, such as microprocessors, that contain an onchip, diode-connected transistor.

Features

● Two Channels: Measures Both Remote and Local

Temperatures

● No Calibration Required

● SMBus 2-Wire Serial Interface

● Programmable Under/Overtemperature Alarms

● Supports SMBus Alert Response

● Accuracy:

? ±2°C (+60°C to +100°C, local)

? ±3°C (-40°C to +125°C, local)

? ±3°C (+60°C to +100°C, remote)

● 3μA (typ) Standby Supply Current

● 70μA (max) Supply Current in Auto-Convert Mode

● +3V to +5.5V Supply Range

● Small, 16-Pin QSOP Package

Applications

● Desktop and Notebook Computers

● Smart Battery Packs

● LAN Servers

● Industrial Controls

● Central Offce Telecom Equipment

● Test and Measurement

● Multi-Chip Modules